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Finding the Fourth Proportional to 11,485.66, 17,213.80 and 9,998.80

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Solution

The fourth proportional to 11,485.66, 17,213.80 and 9,998.80 is: 14,985.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,485.66 : 17,213.80 = 9,998.80 : x
  2. Step 2: Convert to fraction form
    11,485.66/17,213.80 = 9,998.80/x
  3. Step 3: Cross multiply
    11,485.66x = 17,213.80 × 9,998.80
  4. Step 4: Simplify right side
    11,485.66x = 172,117,343.44
  5. Step 5: Solve for x
    x = 172,117,343.44/11,485.66
  6. Step 6: Final answer
    x = 14,985.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.